Keep an eye on this map:
My hypothesis is that areas that are below in their normal rainfall totals, experience brief periods of heavy downpours to "catch up". Hence the Net Sum is Zero.
For example, after years of drought in California, we had the second wettest winter on record. And as you can see, California is shaded deep green.
If my hypothesis is correct, Brownsville, TX and Beaumont, TX will get hit with a tropical system this season. Thus, reversing the mild and moderate areas of drought. If North Carolina continues to dry out, I'll add them to the list too.









